The 18-year-old has made headlines after scoring four goals in his first two senior games for the club.

Having hit two on his debut against Midtjylland in the Europa League last Thursday, he scored twice again on Sunday as Arsenal were beaten 3-2 in the Premier League on Sunday.

It means that Van Gaal, whose side face Watford in the league at Old Trafford on Wednesday, will have a tough job leaving the teenager out of his attack, even as Anthony Martial nears a return to fitness after a recent hamstring injury.

10 things you need to know about emerging Manchester United talent Marcus Rashford

10 things you need to know about emerging Manchester United talent Marcus Rashford

He said: “I think he’s a very modest guy so I don’t think that will be a problem. When you have so much media attention, it can go another way, but I feel he can keep his feet on the ground."

Martial is in the frame to make a comeback against Watford, while full-back Matteo Darmian has recovered from a dislocated shoulder. Centre-back Chris Smalling is also over a shoulder injury.

Van Gaal, whose side are on the up after three straight wins, insists he will not repeat the touchline antics he came out with against Arsenal on Sunday because he is not a “clown”.

The manager theatrically dived to the floor in front of fourth official Mike Dean when his side failed to get a key decision in their favour on Sunday.

It harked back to the Dutchman’s early managerial career, when he performed a flying kung-fu-style kick on the touchline when his Ajax team were denied a penalty during the 1995 Champions League final against AC Milan.

At that time, Van Gaal was furious that Milan midfielder Marcel Desailly had escaped unpunished with a head-high tackle on Ajax striker Jari Litmanen.

“I am not a clown. I am Louis van Gaal. I am a human being and a manager”

Louis van Gaal

Van Gaal said: “I am not a clown. I am Louis van Gaal. I am a human being and a manager.

"My players have to think on the pitch. I help them more to train what I have said that they see the solutions on the pitch. That’s why I’m not doing that.

“I have done this also in the Champions League final. I was jumping like that also when there was a defender who was putting his foot at that height against Jari Litmanen.

“That was my way of saying it but it was too emotional.

"You have to deal with the fourth official and the authority of the referee. I have to control my emotion and that is why I have apologised. But I don’t feel sorry for it, because it’s me. I think I was right.”